Machine



(No Model.) 2 SheetsSheet 1.

G. J. PIOKETT.

COFFEE CLEANING MACHINE.

No. 404,430. Patented June 4, 1889. v

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N, PETERS. PheloL'flhogrwhur. Washington. 040..

UNITED STATES PATENT OFFICE,

CHANCY J. PICKETT, OF BAY CITY, MICHIGAN, ASSIGNOR OF TW'O-THIRDS TO\VILLARD I. BROTHERTON AND HENRY N. IVATROUS, OF SAME PLACE.

COFFEE-CLEANING MACHINE.

SPECIFICATION forming part of Letters Patent No. 404,430, dated June 4,1889.

Application filed September 19, 1888, Serial No. 285,788. (No model.) I

To all whom it may concern:

Be it known that I, CHANCY J. PICKETT, a citizen of the United States,residing at Bay City, in the county of Bay and State of Michigan, haveinvented certain new and 'useful Improvements in CoffeeCleaningMachines, of which the following is a specification, reference being hadtherein to the accompanying drawings.

This invention relates to a new and useful improvement in a coffeecleaner and separator; and the object of the invention is to free thecoffee from foreign ingredients, especially stones, pieces of wire, andiron, which are liable to injure the grinding-mill; further, to free itfrom dust and other like debris and refuse, and, further, to grade thecoffee into the ordinary merchantable sizes and.

separate it from the broken kernels.

To this end my invention consists in the construction, arrangement, andcombination of the different parts in a single operative machine, all asmore fully hereinafter described and shown in the accompanying drawings,and pointed out in the claim.

In the drawings, Figure l is a side elevation; Fig. 2, a verticalcentral longitudinal section, and Fig. 3 a plan thereof.

A is the frame of the machine, suitably constructed to support theoperating parts thereof.

B is a rotary fan or blower of known c011- struction, secured within acasing or frame C built upon one end of the machine and provided withthe usual air-inlets D. An upwardlyinclined blast ductE connects withthis casin g and carries the blast created by the fan into the upperportion of the machine, where itis discharged in a concentrated formthrough the discharge-opening F of the blast-duct.

G is a feed-hopper supported on top of the frame, near one end thereof,and provided with the adjustable feed-slide H.

I is an inclined spreader-pan movably secured below the discharge-spoutof the 110pper by means of a pivotal connection J at one endand thehangers K at the other end. This spreader-pan is provided with thecrossslats L, and is agitated by a suitable connection with thetransverse shaft M in a wellknown manner. This spreader-pan has itsoutside the frame.

discharge end some distance above the terminal of the blast duct, and insuch proximity thereto as to cause the material to fall into the path ofthe blast, which passes in a diagonally-upward direction through it.

N is a direction-board, preferably provided at its upper end with anadjustable portion 0. This board is slightly inclined, as shown, and isintended to direct the heavy material escaping the blast into a draweror receptacle P below, and to direct with its upper end the blast andsuch materials as are carried by the blast into the wind-chamberQ,formed on top of the frame. This chamber is provided at its bottom withthe endless carrier S, which preferably consists of an apron providedwith cross-slats and mounted upon suitable rollers T T. At its fartherend the windchamber is contracted into a throat V by means of aninclined direction-board U, the free end of which loosely rides upon thecarrier, being attached for this purpose by a loose connection a at itsrear end to the frame of the machine, and the throat V communi- 7'5cates with the discharge-spout R extending The top of the windchamber,top of the throat, and top of the. discharge-spout are in one horizontalplane, 7 while the bottom of this wind-chamber, by So the constructiondescribed and shown, forms a gradual contraction toward the end.

At the inner end of the carrier is formed the discharge-throat NV, andbelow this is placed an inclined direction-board X, and below this islocated the inner end of the separator-screens Y Y, which are secured ina frame Z, which is reciprocatingly mounted in the frame of the machineand receives an endwise-shaking motion by a suitable con- 0 nection withthe revolving shaft 17. Below these screens are placed suitable drawers0 and d, the former one receiving the material passing through the,upper screen and the latter the material discharging through the 5 lowerscreen. The material which does not pass through the upper screen iscarried off by a discharge-spout c, which extends through the rear endof the machine. 1

Motion is communicated to the various I00 movable part-s of the device,preferably in the following manner: The power is communicated to theshaft of the fan in the first instance, and from there it is transmittedto the shaft M. This shaft carries upon one end two pulleys, from one ofwhich motion is communicated to the shaft 1), and from the other ofwhich motion is communicated to the shaft of one of the carrier-rolls.The screens are reciprocated, preferably, by an eccentric f on the shaft1), and the spreader-pan I is laterally agitated by its connection withthe shaft M, which consists, preferably, of the crank g, pitman h,bell-crank i, and connecting-link 7c.

The frame of the machine is suitably provided with removable doors topermit access to the interior, and all the parts where needed areprovided with such adjustments as are found necessary in the ordinaryconstruction of such devices.

In practice, the parts being arranged and constructed substantially asdescribed, they are intended to operate as follows: The raw materialbeing fed into the hopper is discharged therefrom with a properadjustment of the feed-slide unto the spreader-pan I, from which it isspread by the cross-slats L, and forwarded to the inner end by thecombined action of the inclination of the board and the lateral shakingmotion applied to the inner end of thepan. As the material is dischargedfrom the spreader-pan, it falls directly into the blast from the fanwhich is concentrated upon it, and acting in an upward direction,besides, carries all the material through the opening Z into thewind-chamber Q, except such weightier materials as stones, pieces ofiron, &c., which are directed into the drawer P below. The wind-chamberQ allows the blast to expand, and thereby permits the heavier materialto drop to the bottom thereof, while 'the lighter materialsuch as dust,chaff, and Quakers-is carried by the wind into the discharge-throat V,from which it is blown out finally through the discharge-spout R. Thematerial which is not blown out, and which comprises all the valuableportion of the raw material, is collected upon the carrier S, the motionof which feeds it in a continual and even stream toward the inner endthereof, from which it falls through the throat W onto the board X, andfrom there onto the upper screen. This upper screen has its meshesselected of such size as to pass only the smaller and broken kernelsthrough it, while the larger and perfect kernels are directed throughthe discharge-spout e to the outside and collected there. The materialpassing through the upper screen passes into the lower screen, which isa finer mesh, to retain the smaller kernels upon the screen andgradually forward them into the drawer 0, while the broken kernels fallthrough the screen and are collected in the drawer (Z.

It will be understood that by means of the adjustability of the board 0the effect of the blast can be increased or decreased to effect theproper separation.

By hinging or otherwise securing the board U loosely, as described, itwill always ride with its free end upon the carrier, and thereby preventany escape of the blast. At the same time it gives direction for thewind to the discharge-spout B.

What I claim as my invention is- The combination, with the wind-chamberand the endless carrier, of the inclined direction-board U, looselyattached at one end to the frame of the machine and its other end ridingloosely upon said carrier, substantially as described.

In testimony whereof I affix my signature, in presence of two witnesses,this 23d day of August, 1888.

CI'IANGY J. PIOKETT.

\Vitnesses:

S. M. HALBERT, JoI-IN SCHUMAN.

